lsv

Not unusual really, same as TLR's albeit they are cable operated......

If you want a good open end jaw spanner then a Stahlwille No 14 or No13 pattern combination will not spread and round the nut or you may be able to get a No21 pattern ring spanner in there. They are "simply the best" IMHO. And another thing you could do is to change the nuts from 13mm hex to the 12mm hex that are found on better quality bikes like Hondas! 😉

Why can't Honda UK help? Normally for a fee (£30 last time I used them) they can supply relevant info from Japan although it can take a while. After all, where does the H.O.C.(GB) get it's info from?

Just get a 4-RIDE - job done!

I guess Honda/Montesa follow the the mantra "If it ain't broke, don't fix it" Unlike some of us that seem to adhere to "If it ain't broke, fix it until it is!" 🙂

That does sound like what we would call a bad earth (grounding problem).

I would have thought a switch in series with the main fuse would suffice as they don't need battery to run ignition I believe. But I stand to be corrected! 🙂

I suspect that as usual, they will go to the great trouble of completely changing a few stickers........

Could try a larger bore master cylinder - maybe off a road/trail bike model. That will make you squeeze the lever a bit harder to lock the brake...........

https://www.ebay.co.uk/itm/113158712359?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338365712&toolid=20006&customid=EB266447402&amdata=enc%3A1RDMnJ-6DTeaZJOW2witnkA95&_trkparms=ispr%3D1

Got a complete set of spokes if needed................

Whilst the leg appears similar the bracket is a lot different TBH. I know, I have both..................

https://jbanyeres.com/product/caballete-aluminio-mitani-para-honda-rtl-250s-modelos-anos-88-89-13/

That's as maybe, but I wouldn't think Honda/Montesa would spec full compliment if they didn't think it was necessary. Full compliment have a greater load rating I believe............

It is VERY important to also check/replace the two more bearings that are in the swinging arm, these,if neglected can result in a very expensive repair....... Whilst agreeing with the above statement I would be wary of May be cheapest but they aren't the correct needle rollers in their kit - should be full compliment type..............